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Bit Array iterator test
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README.md
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jsBenchIt.json
{"title":"Bit Array iterator test","initialization":"class BitArrayU8 {\n constructor(length) {\n this.bits = new Uint8Array(Math.ceil(length / 8));\n this.length = length;\n }\n\n at(i) {\n return (this.bits[i >> 3] & (1 << (i & 7))) ? true : false;\n }\n\n fill(bool) {\n this.bits.fill(bool ? 255 : 0);\n }\n \n forEach(cb) {\n const {bits, length} = this;\n for(let i = 0; i < length; i++) {\n cb((bits[i >> 3] & (1 << (i & 7))) ? true : false, i, bits);\n }\n }\n \n [Symbol.iterator]() {\n let i = 0;\n const {bits, length} = this;\n return {\n next(){\n if (i < length) {\n const v = {\n done: false,\n value: (bits[i >> 3] & (1 << (i & 7))) ? true : false\n };\n i++;\n return v;\n }\n return {done: true, value: undefined};\n }\n };\n }\n}\n\nclass BitArrayU32 {\n constructor(length) {\n this.bits32 = new Uint32Array(Math.ceil(length / 32));\n this.bits = new Uint8Array(this.bits32.buffer);\n this.length = length;\n }\n\n fill(bool) {\n this.bits32.fill(bool ? 0xFFFFFFFF : 0);\n }\n \n at(i) {\n return (this.bits32[i >> 5] & (1 << (i & 31))) ? true : false;\n }\n \n forEach(cb) {\n const {bits32, length} = this;\n for(let i = 0; i < length; i++) {\n cb((bits32[i >> 5] & (1 << (i & 31))) ? true : false, i, bits32);\n }\n }\n\n [Symbol.iterator]() {\n let i = 0;\n const {bits32, length} = this;\n return {\n next(){\n if (i < length) {\n const v = {\n done: false,\n value: (bits32[i >> 5] & (1 << (i & 31))) ? true : false\n };\n i++;\n return v;\n }\n return {done: true, value: undefined};\n }\n };\n }\n}\n\nclass BitArrayU32_2 {\n constructor(length) {\n this.bits32 = new Uint32Array(Math.ceil(length / 32));\n this.bits = new Uint8Array(this.bits32.buffer);\n this.length = length;\n }\n\n fill(bool) {\n this.bits32.fill(bool ? 0xFFFFFFFF : 0);\n }\n \n at(i) {\n return (this.bits32[i >> 5] & (1 << (i & 31))) ? true : false;\n }\n \n forEach(cb) {\n const {bits32, length} = this;\n let i = 0, v = 0;\n while(i + 32 < length) {\n v = bits32[i >> 5];\n for (let j = 1; j; j <<= 1) {\n\t cb((v & j) ? true : false, i++, bits32);\n }\n }\n v = bits32[i >> 5];\n for(; i < length; i++) {\n cb((v & (1 << (i & 31))) ? true : false, i, bits32);\n }\n }\n\n *[Symbol.iterator]() {\n const {bits32, length} = this;\n for(let i = 0; i < length; i++) {\n yield (bits32[i >> 5] & (1 << (i & 31))) ? true : false;\n }\n }\n}\n\nconst bitArrU8 = new BitArrayU8(1000);\nconst bitArrU32 = new BitArrayU32(1000);\nconst bitArrU32_2 = new BitArrayU32_2(1000);\nbitArrU8.fill(true);\nbitArrU32.fill(true);\nbitArrU32_2.fill(true);","setup":"// runs before each test\n","tests":[{"name":"[...bitArrU8] custom iterator","code":"const t = [...bitArrU8];","results":{"aborted":false,"count":2452,"cycles":4,"hz":31862.411618574428,"stats":{"moe":2.974492483316081e-7,"rme":0.9477450385977259,"sem":1.5175982057735106e-7,"deviation":0.000001251443539930406,"mean":0.00003138494386335285,"variance":1.5661109336335456e-12,"numSamples":68},"times":{"cycle":0.07695588235294118,"elapsed":5.878,"period":0.00003138494386335285,"timeStamp":1695680590928}},"platforms":{"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/118.0":{"aborted":false,"count":4691,"cycles":4,"hz":56585.46382504041,"stats":{"moe":3.5522411961682897e-7,"rme":2.0100521570359904,"sem":1.8123679572287191e-7,"deviation":0.0000014038541831093572,"mean":0.000017672383195301763,"variance":1.9708065674336406e-12,"numSamples":60},"times":{"cycle":0.08290114956916057,"elapsed":6,"period":0.000017672383195301763,"timeStamp":1695680486407}},"Mozilla/5.0 (X11; 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